MUMBAI: The Delhi police chief Neeraj Kumar has stated that they are keeping a vigilant eye on at least three more cricketers for their participation in alleged spot fixing in the cash rich Indian Premier League (IPL).

Kumar said the players under scrutiny were all Indians from one team but declined to name them.

Three cricketers, including Indian fast bowler S Sreesanth, were arrested last week over allegations of spot-fixing.

Sreesanth and the families of the other two have denied the charge. On Tuesday, a court extended their custody for five more days.

The players have also been suspended by BCCI and the Rajasthan Royals.

Spot-fixing involves illegally rigging parts of a match, for example by timing the delivery of a deliberate wide or no-ball, to benefit bookmakers or those betting on matches.

"We are looking at other teams and other players as well, and specifically at three Indian players from one team," said Kumar in a quote to The Indian Express.

The police chief declined to name the players saying it will "affect our investigation".

Police say players use codes like "rotating their watches", "putting towels in their pants", "taking out lockets from their shirts", or "making signs with their clothes" to communicate with the bookmakers.